SGI Keyboard, is it PS/2 compatible, please??

[klosters64a]

I picked up an SGI keyboard that seems to have a regular PS/2 plug on it. It is possibly from the Irix 2 era, but I don't really know this. I'm chary of plugging this in to my B box, naturally. Any help on this will be greatly appreciated!
I'm happy to post its SGI #, Model #, Serial # and FCC ID if it'll help.

For $1, would you have passed it up? I couldn't!

[Ridenow]

Dunno. I see 2 options: look on SGI's site for some tech specs or try it.
If it looks like the connectors fit I suspect it will work, no problem.